Lifetimes of intruder states in 186Pb, 188Pb and 194Po

✍ Scribed by T. Grahn; A. Dewald; O. Möller; R. Julin; C.W. Beausang; S. Christen; I.G. Darby; S. Eeckhaudt; P.T. Greenlees; A. Görgen; K. Helariutta; J. Jolie; P. Jones; S. Juutinen; H. Kettunen; T. Kröll; R. Krücken; Y. Le Coz; M. Leino; A.-P. Leppänen; P. Maierbeck; D.A. Meyer; B. Melon; P. Nieminen; M. Nyman; R.D. Page; J. Pakarinen; P. Petkov; P. Rahkila; B. Saha; M. Sandzelius; J. Sarén; C. Scholey; J. Uusitalo; M. Bender; P.-H. Heenen

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 841 KB
• Volume: 801
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2008.01.002

✦ Synopsis

Lifetimes of prolate intruder states in 186 Pb and 188 Pb and oblate intruder states in 194 Po have been determined through recoil distance Doppler-shift lifetime measurements. Deformation parameters of |β 2 | = 0.29(5) and |β 2 | = 0.17(3) have been extracted from experimental B(E2) values for the prolate and the oblate bands, respectively. The present study addresses the phenomenon of shape coexistence typical for the nuclei near Z = 82 and N = 104, providing information on configuration mixing of intrinsic structures of the nuclei of interest. The results are compared with the available lifetime data and theoretical results for neutron-deficient Po, Pb, Hg and Pt nuclei. Furthermore, new self-consistent mean-field calculations have been carried out for 194 Po.